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TI-2026-27183 Aliases CVE-2026-34961GHSA-vv9w-vff6-5rx9

barebox ext4 Extent Parsing Out-of-Bounds Read

Priority LOW 30CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

barebox prior to version 2026.04.0 contains out-of-bounds read vulnerabilities in ext4 extent parsing due to missing validation of the eh_entries field against buffer capacity in fs/ext4/ext4_common.c. Attackers can supply a malicious ext4 filesystem image via USB, SD card, or network boot to trigger heap out-of-bounds reads during boot-time filesystem parsing, potentially redirecting reads to arbitrary disk offsets.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00207 10th percentileScored 2026-11-07
Fix Fixed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

No affected products listed by the sources yet.

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:*before 2026.04.0Vulnerablebarebox
  • cpe:2.3:a:pengutronix:barebox:*:*:*:*:*:*:*:* Versions before 2026.04.0 Vulnerable ·barebox

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    barebox 2026.04.0

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2026-27185 barebox EFI PE Loader Memory Safety VulnerabilitiesPriority LOW 38
    • TI-2026-27182 barebox Out-of-Bounds Read in DHCP Option ParsingPriority LOW 31
    • TI-2026-27184 barebox ext4 Directory Parsing Infinite Loop Denial of ServicePriority LOW 29
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-34961
  2. 2026-10-03 Alias added: GHSA-vv9w-vff6-5rx9

References

Patch 1

Other 2

  • TI-2019-11982 Pengutronix barebox through 2019.08.1 has a remote buffer overflow in nfs_readlink_req in… CVSS 3.0CRITICAL 9.8
  • TI-2019-11981 Pengutronix barebox through 2019.08.1 has a remote buffer overflow in nfs_readlink_reply… CVSS 3.0CRITICAL 9.8
  • TI-2020-10888 Pengutronix Barebox through v2020.05.0 has an out-of-bounds read in nfs_read_reply in… CVSS 3.1CRITICAL 9.1
  • TI-2026-27185 barebox EFI PE Loader Memory Safety Vulnerabilities CVSS 4.0HIGH 8.6
  • TI-2026-25661 barebox: FIT Signature Verification Bypass Vulnerability CVSS 3.1HIGH 8.3
  • TI-2021-15656 common/password.c in Pengutronix barebox through 2021.07.0 leaks timing information… CVSS 3.1HIGH 7.5
See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences